No it's a closed syllable.
Yes, "trees" is a one-syllable word, so it works in a haiku poem which follows the 5-7-5 syllable structure.
no, its a four syllable word cal-cu-la-tion
Subterranean
The second syllable of the word 'conservative' is stressed (con'ser'va'tive).
no, it has 3
infatuation?
yes
5 syllables
It would be considerable.
That was an abominable question! - a·bom·i·na·ble
the answer is 5, a, e, i, a, e